Exochosphaeridium bifidum var. involutum

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"var. involutum" Davey, 1969c, p.29, pl.2, figs.1-3.  Emendation: Marheinecke, 1992, p.52, as Exochosphaeridium bifidum subsp. involutum.  Holotype: Davey, 1969c, pl.2, fig.3.  NOW Exochosphaeridium bifidum subsp. involutum.  Originally Exochosphaeridium bifidum var. involutum, subsequently (and now) Exochosphaeridium bifidum subsp. involutum.  Age: Campanian-Maastrichtian. Parent: Exochosphaeridium bifidum